Small Engines (Lawn Mowers, etc.)/pressure washer backfired

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Question
I WAS USING MY PRESSURE WASHER IT WAS RUNNING REAL GOOD FOR ABOUT 15 MINUTES, WHEN ALL OF A SUDDEN IT BACK-FIRED AND STOPPED. I TRIED TO RESTART AND NOTICED THAT I COULD PULL THE STARTER ROPE VERY EASY, NO COMPRESSION AT ALL. DO I HAVE A VALVE PROBLEM MAYBE?          TROYBILT MODEL 020292 REV# 00      ENGINE NO. 10T502 0130 E1 06052251. ERIC COULD YOU PLEASE GIVE ME AND IDEA WHERE TO START. THANK YOU FOR YOUR TJME.

Answer
Very basic L-head Briggs engine.  I'd start by removing the spark plug and pulling the string while holding you finger over the spark plug hole.  You should feel compression when you pull the string.

If no compression, you can remove the muffler to access and remove the valve breather.  Remove the 2 screws holdling the breather to the engine.  You should see the valve tappets move as you pull the string.  

Another trick is to use a drinking straw to see if the piston if moving.  Insert the straw in to the spark plug hole.  You will have to tilt the straw a little to reach the piston as the spark plug hole is actually over the valves.  You should fell the straw move as the piston moves up and down when you pull the string.

Let me know what you find.
Eric

Small Engines (Lawn Mowers, etc.)

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Eric A. Jones

Expertise

Lawnmower Repair . Certified Master Service Technician from B&S. Have 23 years experience on B&S, Lawn Chief, Weed Eater, Echo, Peerless, Wheel Horse, Snapper, Atlas, MTD, McCulloch, Homelite and many other numerous brands. Specialize in electrical repair.

Experience

Born and raised in the midwest. Started tinkering with engines when I was about 14 on my Suzuki RM-80. I began lawn mower repair at a small hardware store. I knew absolutely nothing. I read lots of repair manuals and met an older fellow who taught me many lessons. I continued working on small engines through high school and paid my way through college working on mowers at the same hardware store. Decided to get away from the midwest and mower repair so I joined the Air Force. I repaired air traffic control electronic equipment and ended up in Hawaii where I got a part time job at Small Engine Clinic. I gained a lot of experience from the Small Engine Clinic and had a blast repairing small engines. I then took the Briggs and Stratton Master Service Technician test and earned my MST. I then traveled to Wisconsin where I attended the factory update training seminar and received formal training. Continued working on mowers part time as I completed 20 years of military. Retired from the military on a Friday and continued in the lawn and garden industry the next Monday.

Education/Credentials
MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

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